It is not illegal for college air ticket agents. Ticket agents mainly sell ticket sources to buyers for organizers, studios and ticketing platforms. Ticket sources are regular, because it is very difficult for a big platform like barley net to grab tickets, and the organizers will reserve high-quality ticket sources for ticket agents, forming a ticketing ecological chain. However, there is a layer-by-layer agent model in the ticketing industry, and it is not easy for partners who like idols to find a reliable ticket. Expansion: legal analysis: whether the air ticket agent is illegal depends on whether it has business qualifications, and only those with business licenses are legal. Legal basis: Article 19 of the Measures for the Administration of Invoices in People's Republic of China (PRC). Units and individuals that sell goods, provide services and engage in other business activities collect money from outside, and the payee shall issue an invoice to the payer; Under special circumstances, the payer will issue an invoice to the payee.